| /* |
| * linux/fs/isofs/inode.c |
| * |
| * (C) 1991 Linus Torvalds - minix filesystem |
| * 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem. |
| * 1994 Eberhard Moenkeberg - multi session handling. |
| * 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs. |
| * 1997 Gordon Chaffee - Joliet CDs |
| * 1998 Eric Lammerts - ISO 9660 Level 3 |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/module.h> |
| |
| #include <linux/stat.h> |
| #include <linux/sched.h> |
| #include <linux/iso_fs.h> |
| #include <linux/kernel.h> |
| #include <linux/major.h> |
| #include <linux/mm.h> |
| #include <linux/string.h> |
| #include <linux/locks.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/cdrom.h> |
| #include <linux/init.h> |
| #include <linux/nls.h> |
| #include <linux/ctype.h> |
| #include <linux/smp_lock.h> |
| #include <linux/blkdev.h> |
| |
| #include <asm/system.h> |
| #include <asm/uaccess.h> |
| |
| #include "zisofs.h" |
| |
| /* |
| * We have no support for "multi volume" CDs, but more and more disks carry |
| * wrong information within the volume descriptors. |
| */ |
| #define IGNORE_WRONG_MULTI_VOLUME_SPECS |
| #define BEQUIET |
| |
| #ifdef LEAK_CHECK |
| static int check_malloc = 0; |
| static int check_bread = 0; |
| #endif |
| |
| static int isofs_hashi(struct dentry *parent, struct qstr *qstr); |
| static int isofs_hash(struct dentry *parent, struct qstr *qstr); |
| static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b); |
| static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b); |
| |
| #ifdef CONFIG_JOLIET |
| static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr); |
| static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr); |
| static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b); |
| static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b); |
| #endif |
| |
| static void isofs_put_super(struct super_block *sb) |
| { |
| #ifdef CONFIG_JOLIET |
| if (sb->u.isofs_sb.s_nls_iocharset) { |
| unload_nls(sb->u.isofs_sb.s_nls_iocharset); |
| sb->u.isofs_sb.s_nls_iocharset = NULL; |
| } |
| #endif |
| |
| #ifdef LEAK_CHECK |
| printk("Outstanding mallocs:%d, outstanding buffers: %d\n", |
| check_malloc, check_bread); |
| #endif |
| |
| return; |
| } |
| |
| static void isofs_read_inode(struct inode *); |
| static int isofs_statfs (struct super_block *, struct statfs *); |
| |
| static kmem_cache_t *isofs_inode_cachep; |
| |
| static struct inode *isofs_alloc_inode(struct super_block *sb) |
| { |
| struct iso_inode_info *ei; |
| ei = (struct iso_inode_info *)kmem_cache_alloc(isofs_inode_cachep, SLAB_KERNEL); |
| if (!ei) |
| return NULL; |
| return &ei->vfs_inode; |
| } |
| |
| static void isofs_destroy_inode(struct inode *inode) |
| { |
| kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); |
| } |
| |
| static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
| { |
| struct iso_inode_info *ei = (struct iso_inode_info *) foo; |
| |
| if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == |
| SLAB_CTOR_CONSTRUCTOR) |
| inode_init_once(&ei->vfs_inode); |
| } |
| |
| static int init_inodecache(void) |
| { |
| isofs_inode_cachep = kmem_cache_create("isofs_inode_cache", |
| sizeof(struct iso_inode_info), |
| 0, SLAB_HWCACHE_ALIGN, |
| init_once, NULL); |
| if (isofs_inode_cachep == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void destroy_inodecache(void) |
| { |
| if (kmem_cache_destroy(isofs_inode_cachep)) |
| printk(KERN_INFO "iso_inode_cache: not all structures were freed\n"); |
| } |
| |
| static struct super_operations isofs_sops = { |
| alloc_inode: isofs_alloc_inode, |
| destroy_inode: isofs_destroy_inode, |
| read_inode: isofs_read_inode, |
| put_super: isofs_put_super, |
| statfs: isofs_statfs, |
| }; |
| |
| static struct dentry_operations isofs_dentry_ops[] = { |
| { |
| d_hash: isofs_hash, |
| d_compare: isofs_dentry_cmp, |
| }, |
| { |
| d_hash: isofs_hashi, |
| d_compare: isofs_dentry_cmpi, |
| }, |
| #ifdef CONFIG_JOLIET |
| { |
| d_hash: isofs_hash_ms, |
| d_compare: isofs_dentry_cmp_ms, |
| }, |
| { |
| d_hash: isofs_hashi_ms, |
| d_compare: isofs_dentry_cmpi_ms, |
| } |
| #endif |
| }; |
| |
| struct iso9660_options{ |
| char map; |
| char rock; |
| char joliet; |
| char cruft; |
| char unhide; |
| char nocompress; |
| unsigned char check; |
| unsigned int blocksize; |
| mode_t mode; |
| gid_t gid; |
| uid_t uid; |
| char *iocharset; |
| unsigned char utf8; |
| /* LVE */ |
| s32 session; |
| s32 sbsector; |
| }; |
| |
| /* |
| * Compute the hash for the isofs name corresponding to the dentry. |
| */ |
| static int |
| isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms) |
| { |
| const char *name; |
| int len; |
| |
| len = qstr->len; |
| name = qstr->name; |
| if (ms) { |
| while (len && name[len-1] == '.') |
| len--; |
| } |
| |
| qstr->hash = full_name_hash(name, len); |
| |
| return 0; |
| } |
| |
| /* |
| * Compute the hash for the isofs name corresponding to the dentry. |
| */ |
| static int |
| isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms) |
| { |
| const char *name; |
| int len; |
| char c; |
| unsigned long hash; |
| |
| len = qstr->len; |
| name = qstr->name; |
| if (ms) { |
| while (len && name[len-1] == '.') |
| len--; |
| } |
| |
| hash = init_name_hash(); |
| while (len--) { |
| c = tolower(*name++); |
| hash = partial_name_hash(tolower(c), hash); |
| } |
| qstr->hash = end_name_hash(hash); |
| |
| return 0; |
| } |
| |
| /* |
| * Case insensitive compare of two isofs names. |
| */ |
| static int |
| isofs_dentry_cmpi_common(struct dentry *dentry,struct qstr *a,struct qstr *b,int ms) |
| { |
| int alen, blen; |
| |
| /* A filename cannot end in '.' or we treat it like it has none */ |
| alen = a->len; |
| blen = b->len; |
| if (ms) { |
| while (alen && a->name[alen-1] == '.') |
| alen--; |
| while (blen && b->name[blen-1] == '.') |
| blen--; |
| } |
| if (alen == blen) { |
| if (strnicmp(a->name, b->name, alen) == 0) |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* |
| * Case sensitive compare of two isofs names. |
| */ |
| static int |
| isofs_dentry_cmp_common(struct dentry *dentry,struct qstr *a,struct qstr *b,int ms) |
| { |
| int alen, blen; |
| |
| /* A filename cannot end in '.' or we treat it like it has none */ |
| alen = a->len; |
| blen = b->len; |
| if (ms) { |
| while (alen && a->name[alen-1] == '.') |
| alen--; |
| while (blen && b->name[blen-1] == '.') |
| blen--; |
| } |
| if (alen == blen) { |
| if (strncmp(a->name, b->name, alen) == 0) |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int |
| isofs_hash(struct dentry *dentry, struct qstr *qstr) |
| { |
| return isofs_hash_common(dentry, qstr, 0); |
| } |
| |
| static int |
| isofs_hashi(struct dentry *dentry, struct qstr *qstr) |
| { |
| return isofs_hashi_common(dentry, qstr, 0); |
| } |
| |
| static int |
| isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b) |
| { |
| return isofs_dentry_cmp_common(dentry, a, b, 0); |
| } |
| |
| static int |
| isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b) |
| { |
| return isofs_dentry_cmpi_common(dentry, a, b, 0); |
| } |
| |
| #ifdef CONFIG_JOLIET |
| static int |
| isofs_hash_ms(struct dentry *dentry, struct qstr *qstr) |
| { |
| return isofs_hash_common(dentry, qstr, 1); |
| } |
| |
| static int |
| isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr) |
| { |
| return isofs_hashi_common(dentry, qstr, 1); |
| } |
| |
| static int |
| isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b) |
| { |
| return isofs_dentry_cmp_common(dentry, a, b, 1); |
| } |
| |
| static int |
| isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b) |
| { |
| return isofs_dentry_cmpi_common(dentry, a, b, 1); |
| } |
| #endif |
| |
| static int parse_options(char *options, struct iso9660_options * popt) |
| { |
| char *this_char,*value; |
| |
| popt->map = 'n'; |
| popt->rock = 'y'; |
| popt->joliet = 'y'; |
| popt->cruft = 'n'; |
| popt->unhide = 'n'; |
| popt->check = 'u'; /* unset */ |
| popt->nocompress = 0; |
| popt->blocksize = 1024; |
| popt->mode = S_IRUGO | S_IXUGO; /* r-x for all. The disc could |
| be shared with DOS machines so |
| virtually anything could be |
| a valid executable. */ |
| popt->gid = 0; |
| popt->uid = 0; |
| popt->iocharset = NULL; |
| popt->utf8 = 0; |
| popt->session=-1; |
| popt->sbsector=-1; |
| if (!options) return 1; |
| for (this_char = strtok(options,","); this_char; this_char = strtok(NULL,",")) { |
| if (strncmp(this_char,"norock",6) == 0) { |
| popt->rock = 'n'; |
| continue; |
| } |
| if (strncmp(this_char,"nojoliet",8) == 0) { |
| popt->joliet = 'n'; |
| continue; |
| } |
| if (strncmp(this_char,"unhide",6) == 0) { |
| popt->unhide = 'y'; |
| continue; |
| } |
| if (strncmp(this_char,"cruft",5) == 0) { |
| popt->cruft = 'y'; |
| continue; |
| } |
| if (strncmp(this_char,"utf8",4) == 0) { |
| popt->utf8 = 1; |
| continue; |
| } |
| if (strncmp(this_char,"nocompress",10) == 0) { |
| popt->nocompress = 1; |
| continue; |
| } |
| if ((value = strchr(this_char,'=')) != NULL) |
| *value++ = 0; |
| |
| #ifdef CONFIG_JOLIET |
| if (!strcmp(this_char,"iocharset") && value) { |
| popt->iocharset = value; |
| while (*value && *value != ',') |
| value++; |
| if (value == popt->iocharset) |
| return 0; |
| *value = 0; |
| } else |
| #endif |
| if (!strcmp(this_char,"map") && value) { |
| if (value[0] && !value[1] && strchr("ano",*value)) |
| popt->map = *value; |
| else if (!strcmp(value,"off")) popt->map = 'o'; |
| else if (!strcmp(value,"normal")) popt->map = 'n'; |
| else if (!strcmp(value,"acorn")) popt->map = 'a'; |
| else return 0; |
| } |
| if (!strcmp(this_char,"session") && value) { |
| char * vpnt = value; |
| unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0); |
| if(ivalue < 0 || ivalue >99) return 0; |
| popt->session=ivalue+1; |
| } |
| if (!strcmp(this_char,"sbsector") && value) { |
| char * vpnt = value; |
| unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0); |
| if(ivalue < 0 || ivalue >660*512) return 0; |
| popt->sbsector=ivalue; |
| } |
| else if (!strcmp(this_char,"check") && value) { |
| if (value[0] && !value[1] && strchr("rs",*value)) |
| popt->check = *value; |
| else if (!strcmp(value,"relaxed")) popt->check = 'r'; |
| else if (!strcmp(value,"strict")) popt->check = 's'; |
| else return 0; |
| } |
| else if (!strcmp(this_char,"conv") && value) { |
| /* no conversion is done anymore; |
| we still accept the same mount options, |
| but ignore them */ |
| if (value[0] && !value[1] && strchr("btma",*value)) ; |
| else if (!strcmp(value,"binary")) ; |
| else if (!strcmp(value,"text")) ; |
| else if (!strcmp(value,"mtext")) ; |
| else if (!strcmp(value,"auto")) ; |
| else return 0; |
| } |
| else if (value && |
| (!strcmp(this_char,"block") || |
| !strcmp(this_char,"mode") || |
| !strcmp(this_char,"uid") || |
| !strcmp(this_char,"gid"))) { |
| char * vpnt = value; |
| unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0); |
| if (*vpnt) return 0; |
| switch(*this_char) { |
| case 'b': |
| if ( ivalue != 512 |
| && ivalue != 1024 |
| && ivalue != 2048) return 0; |
| popt->blocksize = ivalue; |
| break; |
| case 'u': |
| popt->uid = ivalue; |
| break; |
| case 'g': |
| popt->gid = ivalue; |
| break; |
| case 'm': |
| popt->mode = ivalue; |
| break; |
| } |
| } |
| else return 1; |
| } |
| return 1; |
| } |
| |
| /* |
| * look if the driver can tell the multi session redirection value |
| * |
| * don't change this if you don't know what you do, please! |
| * Multisession is legal only with XA disks. |
| * A non-XA disk with more than one volume descriptor may do it right, but |
| * usually is written in a nowhere standardized "multi-partition" manner. |
| * Multisession uses absolute addressing (solely the first frame of the whole |
| * track is #0), multi-partition uses relative addressing (each first frame of |
| * each track is #0), and a track is not a session. |
| * |
| * A broken CDwriter software or drive firmware does not set new standards, |
| * at least not if conflicting with the existing ones. |
| * |
| * emoenke@gwdg.de |
| */ |
| #define WE_OBEY_THE_WRITTEN_STANDARDS 1 |
| |
| static unsigned int isofs_get_last_session(struct super_block *sb,s32 session ) |
| { |
| struct cdrom_multisession ms_info; |
| unsigned int vol_desc_start; |
| struct block_device *bdev = sb->s_bdev; |
| int i; |
| |
| vol_desc_start=0; |
| ms_info.addr_format=CDROM_LBA; |
| if(session >= 0 && session <= 99) { |
| struct cdrom_tocentry Te; |
| Te.cdte_track=session; |
| Te.cdte_format=CDROM_LBA; |
| i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te); |
| if (!i) { |
| printk(KERN_DEBUG "Session %d start %d type %d\n", |
| session, Te.cdte_addr.lba, |
| Te.cdte_ctrl&CDROM_DATA_TRACK); |
| if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4) |
| return Te.cdte_addr.lba; |
| } |
| |
| printk(KERN_ERR "Invalid session number or type of track\n"); |
| } |
| i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info); |
| if(session > 0) printk(KERN_ERR "Invalid session number\n"); |
| #if 0 |
| printk("isofs.inode: CDROMMULTISESSION: rc=%d\n",i); |
| if (i==0) { |
| printk("isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no"); |
| printk("isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba); |
| } |
| #endif |
| if (i==0) |
| #if WE_OBEY_THE_WRITTEN_STANDARDS |
| if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ |
| #endif |
| vol_desc_start=ms_info.addr.lba; |
| return vol_desc_start; |
| } |
| |
| /* |
| * Initialize the superblock and read the root inode. |
| * |
| * Note: a check_disk_change() has been done immediately prior |
| * to this call, so we don't need to check again. |
| */ |
| static int isofs_fill_super(struct super_block *s, void *data, int silent) |
| { |
| struct buffer_head * bh = NULL, *pri_bh = NULL; |
| struct hs_primary_descriptor * h_pri = NULL; |
| struct iso_primary_descriptor * pri = NULL; |
| struct iso_supplementary_descriptor *sec = NULL; |
| struct iso_directory_record * rootp; |
| int joliet_level = 0; |
| int high_sierra; |
| int iso_blknum, block; |
| int orig_zonesize; |
| int table; |
| unsigned int vol_desc_start; |
| unsigned long first_data_zone; |
| struct inode * inode; |
| struct iso9660_options opt; |
| |
| if (!parse_options((char *) data, &opt)) |
| goto out_unlock; |
| |
| #if 0 |
| printk("map = %c\n", opt.map); |
| printk("rock = %c\n", opt.rock); |
| printk("joliet = %c\n", opt.joliet); |
| printk("check = %c\n", opt.check); |
| printk("cruft = %c\n", opt.cruft); |
| printk("unhide = %c\n", opt.unhide); |
| printk("blocksize = %d\n", opt.blocksize); |
| printk("gid = %d\n", opt.gid); |
| printk("uid = %d\n", opt.uid); |
| printk("iocharset = %s\n", opt.iocharset); |
| #endif |
| |
| /* |
| * First of all, get the hardware blocksize for this device. |
| * If we don't know what it is, or the hardware blocksize is |
| * larger than the blocksize the user specified, then use |
| * that value. |
| */ |
| /* |
| * What if bugger tells us to go beyond page size? |
| */ |
| opt.blocksize = sb_min_blocksize(s, opt.blocksize); |
| |
| s->u.isofs_sb.s_high_sierra = high_sierra = 0; /* default is iso9660 */ |
| |
| vol_desc_start = (opt.sbsector != -1) ? |
| opt.sbsector : isofs_get_last_session(s,opt.session); |
| |
| for (iso_blknum = vol_desc_start+16; |
| iso_blknum < vol_desc_start+100; iso_blknum++) |
| { |
| struct hs_volume_descriptor * hdp; |
| struct iso_volume_descriptor * vdp; |
| |
| block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits); |
| if (!(bh = sb_bread(s, block))) |
| goto out_no_read; |
| |
| vdp = (struct iso_volume_descriptor *)bh->b_data; |
| hdp = (struct hs_volume_descriptor *)bh->b_data; |
| |
| /* Due to the overlapping physical location of the descriptors, |
| * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure |
| * proper identification in this case, we first check for ISO. |
| */ |
| if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) { |
| if (isonum_711 (vdp->type) == ISO_VD_END) |
| break; |
| if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) { |
| if (pri == NULL) { |
| pri = (struct iso_primary_descriptor *)vdp; |
| /* Save the buffer in case we need it ... */ |
| pri_bh = bh; |
| bh = NULL; |
| } |
| } |
| #ifdef CONFIG_JOLIET |
| else if (isonum_711 (vdp->type) == ISO_VD_SUPPLEMENTARY) { |
| sec = (struct iso_supplementary_descriptor *)vdp; |
| if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) { |
| if (opt.joliet == 'y') { |
| if (sec->escape[2] == 0x40) { |
| joliet_level = 1; |
| } else if (sec->escape[2] == 0x43) { |
| joliet_level = 2; |
| } else if (sec->escape[2] == 0x45) { |
| joliet_level = 3; |
| } |
| printk(KERN_DEBUG"ISO 9660 Extensions: Microsoft Joliet Level %d\n", |
| joliet_level); |
| } |
| goto root_found; |
| } else { |
| /* Unknown supplementary volume descriptor */ |
| sec = NULL; |
| } |
| } |
| #endif |
| } else { |
| if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) { |
| if (isonum_711 (hdp->type) != ISO_VD_PRIMARY) |
| goto out_freebh; |
| |
| s->u.isofs_sb.s_high_sierra = 1; |
| high_sierra = 1; |
| opt.rock = 'n'; |
| h_pri = (struct hs_primary_descriptor *)vdp; |
| goto root_found; |
| } |
| } |
| |
| /* Just skip any volume descriptors we don't recognize */ |
| |
| brelse(bh); |
| bh = NULL; |
| } |
| /* |
| * If we fall through, either no volume descriptor was found, |
| * or else we passed a primary descriptor looking for others. |
| */ |
| if (!pri) |
| goto out_unknown_format; |
| brelse(bh); |
| bh = pri_bh; |
| pri_bh = NULL; |
| |
| root_found: |
| |
| if (joliet_level && (pri == NULL || opt.rock == 'n')) { |
| /* This is the case of Joliet with the norock mount flag. |
| * A disc with both Joliet and Rock Ridge is handled later |
| */ |
| pri = (struct iso_primary_descriptor *) sec; |
| } |
| |
| if(high_sierra){ |
| rootp = (struct iso_directory_record *) h_pri->root_directory_record; |
| #ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS |
| if (isonum_723 (h_pri->volume_set_size) != 1) |
| goto out_no_support; |
| #endif /* IGNORE_WRONG_MULTI_VOLUME_SPECS */ |
| s->u.isofs_sb.s_nzones = isonum_733 (h_pri->volume_space_size); |
| s->u.isofs_sb.s_log_zone_size = isonum_723 (h_pri->logical_block_size); |
| s->u.isofs_sb.s_max_size = isonum_733(h_pri->volume_space_size); |
| } else { |
| rootp = (struct iso_directory_record *) pri->root_directory_record; |
| #ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS |
| if (isonum_723 (pri->volume_set_size) != 1) |
| goto out_no_support; |
| #endif /* IGNORE_WRONG_MULTI_VOLUME_SPECS */ |
| s->u.isofs_sb.s_nzones = isonum_733 (pri->volume_space_size); |
| s->u.isofs_sb.s_log_zone_size = isonum_723 (pri->logical_block_size); |
| s->u.isofs_sb.s_max_size = isonum_733(pri->volume_space_size); |
| } |
| |
| s->u.isofs_sb.s_ninodes = 0; /* No way to figure this out easily */ |
| |
| orig_zonesize = s -> u.isofs_sb.s_log_zone_size; |
| /* |
| * If the zone size is smaller than the hardware sector size, |
| * this is a fatal error. This would occur if the disc drive |
| * had sectors that were 2048 bytes, but the filesystem had |
| * blocks that were 512 bytes (which should only very rarely |
| * happen.) |
| */ |
| if(orig_zonesize < opt.blocksize) |
| goto out_bad_size; |
| |
| /* RDE: convert log zone size to bit shift */ |
| switch (s -> u.isofs_sb.s_log_zone_size) |
| { case 512: s -> u.isofs_sb.s_log_zone_size = 9; break; |
| case 1024: s -> u.isofs_sb.s_log_zone_size = 10; break; |
| case 2048: s -> u.isofs_sb.s_log_zone_size = 11; break; |
| |
| default: |
| goto out_bad_zone_size; |
| } |
| |
| s->s_magic = ISOFS_SUPER_MAGIC; |
| |
| /* The CDROM is read-only, has no nodes (devices) on it, and since |
| all of the files appear to be owned by root, we really do not want |
| to allow suid. (suid or devices will not show up unless we have |
| Rock Ridge extensions) */ |
| |
| s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */; |
| |
| /* Set this for reference. Its not currently used except on write |
| which we don't have .. */ |
| |
| /* RDE: data zone now byte offset! */ |
| |
| first_data_zone = ((isonum_733 (rootp->extent) + |
| isonum_711 (rootp->ext_attr_length)) |
| << s -> u.isofs_sb.s_log_zone_size); |
| s->u.isofs_sb.s_firstdatazone = first_data_zone; |
| #ifndef BEQUIET |
| printk(KERN_DEBUG "Max size:%ld Log zone size:%ld\n", |
| s->u.isofs_sb.s_max_size, |
| 1UL << s->u.isofs_sb.s_log_zone_size); |
| printk(KERN_DEBUG "First datazone:%ld Root inode number:%ld\n", |
| s->u.isofs_sb.s_firstdatazone >> s -> u.isofs_sb.s_log_zone_size, |
| s->u.isofs_sb.s_firstdatazone); |
| if(high_sierra) |
| printk(KERN_DEBUG "Disc in High Sierra format.\n"); |
| #endif |
| |
| /* |
| * If the Joliet level is set, we _may_ decide to use the |
| * secondary descriptor, but can't be sure until after we |
| * read the root inode. But before reading the root inode |
| * we may need to change the device blocksize, and would |
| * rather release the old buffer first. So, we cache the |
| * first_data_zone value from the secondary descriptor. |
| */ |
| if (joliet_level) { |
| pri = (struct iso_primary_descriptor *) sec; |
| rootp = (struct iso_directory_record *) |
| pri->root_directory_record; |
| first_data_zone = ((isonum_733 (rootp->extent) + |
| isonum_711 (rootp->ext_attr_length)) |
| << s -> u.isofs_sb.s_log_zone_size); |
| } |
| |
| /* |
| * We're all done using the volume descriptor, and may need |
| * to change the device blocksize, so release the buffer now. |
| */ |
| brelse(pri_bh); |
| brelse(bh); |
| |
| /* |
| * Force the blocksize to 512 for 512 byte sectors. The file |
| * read primitives really get it wrong in a bad way if we don't |
| * do this. |
| * |
| * Note - we should never be setting the blocksize to something |
| * less than the hardware sector size for the device. If we |
| * do, we would end up having to read larger buffers and split |
| * out portions to satisfy requests. |
| * |
| * Note2- the idea here is that we want to deal with the optimal |
| * zonesize in the filesystem. If we have it set to something less, |
| * then we have horrible problems with trying to piece together |
| * bits of adjacent blocks in order to properly read directory |
| * entries. By forcing the blocksize in this way, we ensure |
| * that we will never be required to do this. |
| */ |
| sb_set_blocksize(s, orig_zonesize); |
| |
| s->u.isofs_sb.s_nls_iocharset = NULL; |
| |
| #ifdef CONFIG_JOLIET |
| if (joliet_level && opt.utf8 == 0) { |
| char * p = opt.iocharset ? opt.iocharset : "iso8859-1"; |
| s->u.isofs_sb.s_nls_iocharset = load_nls(p); |
| if (! s->u.isofs_sb.s_nls_iocharset) { |
| /* Fail only if explicit charset specified */ |
| if (opt.iocharset) |
| goto out_unlock; |
| s->u.isofs_sb.s_nls_iocharset = load_nls_default(); |
| } |
| } |
| #endif |
| s->s_op = &isofs_sops; |
| s->u.isofs_sb.s_mapping = opt.map; |
| s->u.isofs_sb.s_rock = (opt.rock == 'y' ? 2 : 0); |
| s->u.isofs_sb.s_rock_offset = -1; /* initial offset, will guess until SP is found*/ |
| s->u.isofs_sb.s_cruft = opt.cruft; |
| s->u.isofs_sb.s_unhide = opt.unhide; |
| s->u.isofs_sb.s_uid = opt.uid; |
| s->u.isofs_sb.s_gid = opt.gid; |
| s->u.isofs_sb.s_utf8 = opt.utf8; |
| s->u.isofs_sb.s_nocompress = opt.nocompress; |
| /* |
| * It would be incredibly stupid to allow people to mark every file |
| * on the disk as suid, so we merely allow them to set the default |
| * permissions. |
| */ |
| s->u.isofs_sb.s_mode = opt.mode & 0777; |
| |
| /* |
| * Read the root inode, which _may_ result in changing |
| * the s_rock flag. Once we have the final s_rock value, |
| * we then decide whether to use the Joliet descriptor. |
| */ |
| inode = iget(s, s->u.isofs_sb.s_firstdatazone); |
| |
| /* |
| * If this disk has both Rock Ridge and Joliet on it, then we |
| * want to use Rock Ridge by default. This can be overridden |
| * by using the norock mount option. There is still one other |
| * possibility that is not taken into account: a Rock Ridge |
| * CD with Unicode names. Until someone sees such a beast, it |
| * will not be supported. |
| */ |
| if (s->u.isofs_sb.s_rock == 1) { |
| joliet_level = 0; |
| } else if (joliet_level) { |
| s->u.isofs_sb.s_rock = 0; |
| if (s->u.isofs_sb.s_firstdatazone != first_data_zone) { |
| s->u.isofs_sb.s_firstdatazone = first_data_zone; |
| printk(KERN_DEBUG |
| "ISOFS: changing to secondary root\n"); |
| iput(inode); |
| inode = iget(s, s->u.isofs_sb.s_firstdatazone); |
| } |
| } |
| |
| if (opt.check == 'u') { |
| /* Only Joliet is case insensitive by default */ |
| if (joliet_level) opt.check = 'r'; |
| else opt.check = 's'; |
| } |
| s->u.isofs_sb.s_joliet_level = joliet_level; |
| |
| /* check the root inode */ |
| if (!inode) |
| goto out_no_root; |
| if (!inode->i_op) |
| goto out_bad_root; |
| /* get the root dentry */ |
| s->s_root = d_alloc_root(inode); |
| if (!(s->s_root)) |
| goto out_no_root; |
| |
| table = 0; |
| if (joliet_level) table += 2; |
| if (opt.check == 'r') table++; |
| s->s_root->d_op = &isofs_dentry_ops[table]; |
| |
| return 0; |
| |
| /* |
| * Display error messages and free resources. |
| */ |
| out_bad_root: |
| printk(KERN_WARNING "isofs_fill_super: root inode not initialized\n"); |
| goto out_iput; |
| out_no_root: |
| printk(KERN_WARNING "isofs_fill_super: get root inode failed\n"); |
| out_iput: |
| iput(inode); |
| #ifdef CONFIG_JOLIET |
| if (s->u.isofs_sb.s_nls_iocharset) |
| unload_nls(s->u.isofs_sb.s_nls_iocharset); |
| #endif |
| goto out_unlock; |
| out_no_read: |
| printk(KERN_WARNING "isofs_fill_super: " |
| "bread failed, dev=%s, iso_blknum=%d, block=%d\n", |
| s->s_id, iso_blknum, block); |
| goto out_unlock; |
| out_bad_zone_size: |
| printk(KERN_WARNING "Bad logical zone size %ld\n", |
| s->u.isofs_sb.s_log_zone_size); |
| goto out_freebh; |
| out_bad_size: |
| printk(KERN_WARNING "Logical zone size(%d) < hardware blocksize(%u)\n", |
| orig_zonesize, opt.blocksize); |
| goto out_freebh; |
| #ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS |
| out_no_support: |
| printk(KERN_WARNING "Multi-volume disks not supported.\n"); |
| goto out_freebh; |
| #endif |
| out_unknown_format: |
| if (!silent) |
| printk(KERN_WARNING "Unable to identify CD-ROM format.\n"); |
| |
| out_freebh: |
| brelse(bh); |
| out_unlock: |
| return -EINVAL; |
| } |
| |
| static int isofs_statfs (struct super_block *sb, struct statfs *buf) |
| { |
| buf->f_type = ISOFS_SUPER_MAGIC; |
| buf->f_bsize = sb->s_blocksize; |
| buf->f_blocks = (sb->u.isofs_sb.s_nzones |
| << (sb->u.isofs_sb.s_log_zone_size - sb->s_blocksize_bits)); |
| buf->f_bfree = 0; |
| buf->f_bavail = 0; |
| buf->f_files = sb->u.isofs_sb.s_ninodes; |
| buf->f_ffree = 0; |
| buf->f_namelen = NAME_MAX; |
| return 0; |
| } |
| |
| /* |
| * Get a set of blocks; filling in buffer_heads if already allocated |
| * or getblk() if they are not. Returns the number of blocks inserted |
| * (0 == error.) |
| */ |
| int isofs_get_blocks(struct inode *inode, sector_t iblock, |
| struct buffer_head **bh, unsigned long nblocks) |
| { |
| unsigned long b_off; |
| unsigned offset, sect_size; |
| unsigned int firstext; |
| unsigned long nextino; |
| int section, rv; |
| struct iso_inode_info *ei = ISOFS_I(inode); |
| |
| lock_kernel(); |
| |
| rv = 0; |
| if (iblock < 0) { |
| printk("isofs_get_blocks: block < 0\n"); |
| goto abort; |
| } |
| |
| b_off = iblock; |
| |
| offset = 0; |
| firstext = ei->i_first_extent; |
| sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode); |
| nextino = ei->i_next_section_ino; |
| section = 0; |
| |
| while ( nblocks ) { |
| /* If we are *way* beyond the end of the file, print a message. |
| * Access beyond the end of the file up to the next page boundary |
| * is normal, however because of the way the page cache works. |
| * In this case, we just return 0 so that we can properly fill |
| * the page with useless information without generating any |
| * I/O errors. |
| */ |
| if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { |
| printk("isofs_get_blocks: block >= EOF (%ld, %ld)\n", |
| iblock, (unsigned long) inode->i_size); |
| goto abort; |
| } |
| |
| if (nextino) { |
| while (b_off >= (offset + sect_size)) { |
| struct inode *ninode; |
| |
| offset += sect_size; |
| if (nextino == 0) |
| goto abort; |
| ninode = iget(inode->i_sb, nextino); |
| if (!ninode) |
| goto abort; |
| firstext = ISOFS_I(ninode)->i_first_extent; |
| sect_size = ISOFS_I(ninode)->i_section_size; |
| nextino = ISOFS_I(ninode)->i_next_section_ino; |
| iput(ninode); |
| |
| if (++section > 100) { |
| printk("isofs_get_blocks: More than 100 file sections ?!?, aborting...\n"); |
| printk("isofs_get_blocks: ino=%lu block=%ld firstext=%u sect_size=%u nextino=%lu\n", |
| inode->i_ino, iblock, firstext, (unsigned) sect_size, nextino); |
| goto abort; |
| } |
| } |
| } |
| |
| if ( *bh ) { |
| map_bh(*bh, inode->i_sb, firstext + b_off - offset); |
| } else { |
| *bh = sb_getblk(inode->i_sb, firstext+b_off-offset); |
| if ( !*bh ) |
| goto abort; |
| } |
| bh++; /* Next buffer head */ |
| b_off++; /* Next buffer offset */ |
| nblocks--; |
| rv++; |
| } |
| |
| |
| abort: |
| unlock_kernel(); |
| return rv; |
| } |
| |
| /* |
| * Used by the standard interfaces. |
| */ |
| static int isofs_get_block(struct inode *inode, sector_t iblock, |
| struct buffer_head *bh_result, int create) |
| { |
| if ( create ) { |
| printk("isofs_get_block: Kernel tries to allocate a block\n"); |
| return -EROFS; |
| } |
| |
| return isofs_get_blocks(inode, iblock, &bh_result, 1) ? 0 : -EIO; |
| } |
| |
| static int isofs_bmap(struct inode *inode, int block) |
| { |
| struct buffer_head dummy; |
| int error; |
| |
| dummy.b_state = 0; |
| dummy.b_blocknr = -1000; |
| error = isofs_get_block(inode, block, &dummy, 0); |
| if (!error) |
| return dummy.b_blocknr; |
| return 0; |
| } |
| |
| struct buffer_head *isofs_bread(struct inode *inode, unsigned int block) |
| { |
| unsigned int blknr = isofs_bmap(inode, block); |
| if (!blknr) |
| return NULL; |
| return sb_bread(inode->i_sb, blknr); |
| } |
| |
| static int isofs_readpage(struct file *file, struct page *page) |
| { |
| return block_read_full_page(page,isofs_get_block); |
| } |
| |
| static int _isofs_bmap(struct address_space *mapping, long block) |
| { |
| return generic_block_bmap(mapping,block,isofs_get_block); |
| } |
| |
| static struct address_space_operations isofs_aops = { |
| readpage: isofs_readpage, |
| sync_page: block_sync_page, |
| bmap: _isofs_bmap |
| }; |
| |
| static inline void test_and_set_uid(uid_t *p, uid_t value) |
| { |
| if(value) { |
| *p = value; |
| } |
| } |
| |
| static inline void test_and_set_gid(gid_t *p, gid_t value) |
| { |
| if(value) { |
| *p = value; |
| } |
| } |
| |
| static int isofs_read_level3_size(struct inode * inode) |
| { |
| unsigned long f_pos = inode->i_ino; |
| unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); |
| int high_sierra = inode->i_sb->u.isofs_sb.s_high_sierra; |
| struct buffer_head * bh = NULL; |
| unsigned long block, offset; |
| int i = 0; |
| int more_entries = 0; |
| struct iso_directory_record * tmpde = NULL; |
| struct iso_inode_info *ei = ISOFS_I(inode); |
| |
| inode->i_size = 0; |
| ei->i_next_section_ino = 0; |
| |
| block = f_pos >> ISOFS_BUFFER_BITS(inode); |
| offset = f_pos & (bufsize-1); |
| |
| do { |
| struct iso_directory_record * de; |
| unsigned int de_len; |
| |
| if (!bh) { |
| bh = sb_bread(inode->i_sb, block); |
| if (!bh) |
| goto out_noread; |
| } |
| de = (struct iso_directory_record *) (bh->b_data + offset); |
| de_len = *(unsigned char *) de; |
| |
| if (de_len == 0) { |
| brelse(bh); |
| bh = NULL; |
| f_pos = (f_pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1); |
| block = f_pos >> ISOFS_BUFFER_BITS(inode); |
| offset = 0; |
| continue; |
| } |
| |
| offset += de_len; |
| |
| /* Make sure we have a full directory entry */ |
| if (offset >= bufsize) { |
| int slop = bufsize - offset + de_len; |
| if (!tmpde) { |
| tmpde = kmalloc(256, GFP_KERNEL); |
| if (!tmpde) |
| goto out_nomem; |
| } |
| memcpy(tmpde, de, slop); |
| offset &= bufsize - 1; |
| block++; |
| brelse(bh); |
| bh = NULL; |
| if (offset) { |
| bh = sb_bread(inode->i_sb, block); |
| if (!bh) |
| goto out_noread; |
| memcpy((void *) tmpde + slop, bh->b_data, offset); |
| } |
| de = tmpde; |
| } |
| |
| inode->i_size += isonum_733(de->size); |
| if (i == 1) |
| ei->i_next_section_ino = f_pos; |
| |
| more_entries = de->flags[-high_sierra] & 0x80; |
| |
| f_pos += de_len; |
| i++; |
| if(i > 100) |
| goto out_toomany; |
| } while(more_entries); |
| out: |
| if (tmpde) |
| kfree(tmpde); |
| if (bh) |
| brelse(bh); |
| return 0; |
| |
| out_nomem: |
| if (bh) |
| brelse(bh); |
| return -ENOMEM; |
| |
| out_noread: |
| printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block); |
| if (tmpde) |
| kfree(tmpde); |
| return -EIO; |
| |
| out_toomany: |
| printk(KERN_INFO "isofs_read_level3_size: " |
| "More than 100 file sections ?!?, aborting...\n" |
| "isofs_read_level3_size: inode=%lu ino=%lu\n", |
| inode->i_ino, f_pos); |
| goto out; |
| } |
| |
| static void isofs_read_inode(struct inode * inode) |
| { |
| struct super_block *sb = inode->i_sb; |
| unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); |
| int block = inode->i_ino >> ISOFS_BUFFER_BITS(inode); |
| int high_sierra = sb->u.isofs_sb.s_high_sierra; |
| struct buffer_head * bh = NULL; |
| struct iso_directory_record * de; |
| struct iso_directory_record * tmpde = NULL; |
| unsigned int de_len; |
| unsigned long offset; |
| int volume_seq_no, i; |
| struct iso_inode_info *ei = ISOFS_I(inode); |
| |
| bh = sb_bread(inode->i_sb, block); |
| if (!bh) |
| goto out_badread; |
| |
| offset = (inode->i_ino & (bufsize - 1)); |
| de = (struct iso_directory_record *) (bh->b_data + offset); |
| de_len = *(unsigned char *) de; |
| |
| if (offset + de_len > bufsize) { |
| int frag1 = bufsize - offset; |
| |
| tmpde = kmalloc(de_len, GFP_KERNEL); |
| if (tmpde == NULL) { |
| printk(KERN_INFO "isofs_read_inode: out of memory\n"); |
| goto fail; |
| } |
| memcpy(tmpde, bh->b_data + offset, frag1); |
| brelse(bh); |
| bh = sb_bread(inode->i_sb, ++block); |
| if (!bh) |
| goto out_badread; |
| memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1); |
| de = tmpde; |
| } |
| |
| /* Assume it is a normal-format file unless told otherwise */ |
| ei->i_file_format = isofs_file_normal; |
| |
| if (de->flags[-high_sierra] & 2) { |
| inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR; |
| inode->i_nlink = 1; /* Set to 1. We know there are 2, but |
| the find utility tries to optimize |
| if it is 2, and it screws up. It is |
| easier to give 1 which tells find to |
| do it the hard way. */ |
| } else { |
| /* Everybody gets to read the file. */ |
| inode->i_mode = inode->i_sb->u.isofs_sb.s_mode; |
| inode->i_nlink = 1; |
| inode->i_mode |= S_IFREG; |
| /* If there are no periods in the name, |
| * then set the execute permission bit |
| */ |
| for(i=0; i< de->name_len[0]; i++) |
| if(de->name[i]=='.' || de->name[i]==';') |
| break; |
| if(i == de->name_len[0] || de->name[i] == ';') |
| inode->i_mode |= S_IXUGO; /* execute permission */ |
| } |
| inode->i_uid = inode->i_sb->u.isofs_sb.s_uid; |
| inode->i_gid = inode->i_sb->u.isofs_sb.s_gid; |
| inode->i_blocks = inode->i_blksize = 0; |
| |
| ei->i_format_parm[0] = 0; |
| ei->i_format_parm[1] = 0; |
| ei->i_format_parm[2] = 0; |
| |
| ei->i_section_size = isonum_733 (de->size); |
| if(de->flags[-high_sierra] & 0x80) { |
| if(isofs_read_level3_size(inode)) goto fail; |
| } else { |
| ei->i_next_section_ino = 0; |
| inode->i_size = isonum_733 (de->size); |
| } |
| |
| /* |
| * The ISO-9660 filesystem only stores 32 bits for file size. |
| * mkisofs handles files up to 2GB-2 = 2147483646 = 0x7FFFFFFE bytes |
| * in size. This is according to the large file summit paper from 1996. |
| * WARNING: ISO-9660 filesystems > 1 GB and even > 2 GB are fully |
| * legal. Do not prevent to use DVD's schilling@fokus.gmd.de |
| */ |
| if ((inode->i_size < 0 || inode->i_size > 0x7FFFFFFE) && |
| inode->i_sb->u.isofs_sb.s_cruft == 'n') { |
| printk(KERN_WARNING "Warning: defective CD-ROM. " |
| "Enabling \"cruft\" mount option.\n"); |
| inode->i_sb->u.isofs_sb.s_cruft = 'y'; |
| } |
| |
| /* |
| * Some dipshit decided to store some other bit of information |
| * in the high byte of the file length. Catch this and holler. |
| * WARNING: this will make it impossible for a file to be > 16MB |
| * on the CDROM. |
| */ |
| |
| if (inode->i_sb->u.isofs_sb.s_cruft == 'y' && |
| inode->i_size & 0xff000000) { |
| inode->i_size &= 0x00ffffff; |
| } |
| |
| if (de->interleave[0]) { |
| printk("Interleaved files not (yet) supported.\n"); |
| inode->i_size = 0; |
| } |
| |
| /* I have no idea what file_unit_size is used for, so |
| we will flag it for now */ |
| if (de->file_unit_size[0] != 0) { |
| printk("File unit size != 0 for ISO file (%ld).\n", |
| inode->i_ino); |
| } |
| |
| /* I have no idea what other flag bits are used for, so |
| we will flag it for now */ |
| #ifdef DEBUG |
| if((de->flags[-high_sierra] & ~2)!= 0){ |
| printk("Unusual flag settings for ISO file (%ld %x).\n", |
| inode->i_ino, de->flags[-high_sierra]); |
| } |
| #endif |
| |
| inode->i_mtime = inode->i_atime = inode->i_ctime = |
| iso_date(de->date, high_sierra); |
| |
| ei->i_first_extent = (isonum_733 (de->extent) + |
| isonum_711 (de->ext_attr_length)); |
| |
| /* Set the number of blocks for stat() - should be done before RR */ |
| inode->i_blksize = PAGE_CACHE_SIZE; /* For stat() only */ |
| inode->i_blocks = (inode->i_size + 511) >> 9; |
| |
| /* |
| * Now test for possible Rock Ridge extensions which will override |
| * some of these numbers in the inode structure. |
| */ |
| |
| if (!high_sierra) { |
| parse_rock_ridge_inode(de, inode); |
| /* if we want uid/gid set, override the rock ridge setting */ |
| test_and_set_uid(&inode->i_uid, inode->i_sb->u.isofs_sb.s_uid); |
| test_and_set_gid(&inode->i_gid, inode->i_sb->u.isofs_sb.s_gid); |
| } |
| |
| /* get the volume sequence number */ |
| volume_seq_no = isonum_723 (de->volume_sequence_number) ; |
| |
| /* |
| * Disable checking if we see any volume number other than 0 or 1. |
| * We could use the cruft option, but that has multiple purposes, one |
| * of which is limiting the file size to 16Mb. Thus we silently allow |
| * volume numbers of 0 to go through without complaining. |
| */ |
| if (inode->i_sb->u.isofs_sb.s_cruft == 'n' && |
| (volume_seq_no != 0) && (volume_seq_no != 1)) { |
| printk(KERN_WARNING "Warning: defective CD-ROM " |
| "(volume sequence number %d). " |
| "Enabling \"cruft\" mount option.\n", volume_seq_no); |
| inode->i_sb->u.isofs_sb.s_cruft = 'y'; |
| } |
| |
| /* Install the inode operations vector */ |
| #ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS |
| if (inode->i_sb->u.isofs_sb.s_cruft != 'y' && |
| (volume_seq_no != 0) && (volume_seq_no != 1)) { |
| printk(KERN_WARNING "Multi-volume CD somehow got mounted.\n"); |
| } else |
| #endif /*IGNORE_WRONG_MULTI_VOLUME_SPECS */ |
| { |
| if (S_ISREG(inode->i_mode)) { |
| inode->i_fop = &generic_ro_fops; |
| switch ( ei->i_file_format ) { |
| #ifdef CONFIG_ZISOFS |
| case isofs_file_compressed: |
| inode->i_data.a_ops = &zisofs_aops; |
| break; |
| #endif |
| default: |
| inode->i_data.a_ops = &isofs_aops; |
| break; |
| } |
| } else if (S_ISDIR(inode->i_mode)) { |
| inode->i_op = &isofs_dir_inode_operations; |
| inode->i_fop = &isofs_dir_operations; |
| } else if (S_ISLNK(inode->i_mode)) { |
| inode->i_op = &page_symlink_inode_operations; |
| inode->i_data.a_ops = &isofs_symlink_aops; |
| } else |
| /* XXX - parse_rock_ridge_inode() had already set i_rdev. */ |
| init_special_inode(inode, inode->i_mode, |
| kdev_t_to_nr(inode->i_rdev)); |
| } |
| out: |
| if (tmpde) |
| kfree(tmpde); |
| if (bh) |
| brelse(bh); |
| return; |
| |
| out_badread: |
| printk(KERN_WARNING "ISOFS: unable to read i-node block\n"); |
| fail: |
| make_bad_inode(inode); |
| goto out; |
| } |
| |
| #ifdef LEAK_CHECK |
| #undef malloc |
| #undef free_s |
| #undef sb_bread |
| #undef brelse |
| |
| void * leak_check_malloc(unsigned int size){ |
| void * tmp; |
| check_malloc++; |
| tmp = kmalloc(size, GFP_KERNEL); |
| return tmp; |
| } |
| |
| void leak_check_free_s(void * obj, int size){ |
| check_malloc--; |
| return kfree(obj); |
| } |
| |
| struct buffer_head * leak_check_bread(struct super_block *sb, int block){ |
| check_bread++; |
| return sb_bread(sb, block); |
| } |
| |
| void leak_check_brelse(struct buffer_head * bh){ |
| check_bread--; |
| return brelse(bh); |
| } |
| |
| #endif |
| |
| static struct super_block *isofs_get_sb(struct file_system_type *fs_type, |
| int flags, char *dev_name, void *data) |
| { |
| return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super); |
| } |
| |
| static struct file_system_type iso9660_fs_type = { |
| owner: THIS_MODULE, |
| name: "iso9660", |
| get_sb: isofs_get_sb, |
| fs_flags: FS_REQUIRES_DEV, |
| }; |
| |
| static int __init init_iso9660_fs(void) |
| { |
| int err = init_inodecache(); |
| if (err) |
| goto out; |
| #ifdef CONFIG_ZISOFS |
| err = zisofs_init(); |
| if (err) |
| goto out1; |
| #endif |
| err = register_filesystem(&iso9660_fs_type); |
| if (err) |
| goto out2; |
| return 0; |
| out2: |
| #ifdef CONFIG_ZISOFS |
| zisofs_cleanup(); |
| out1: |
| #endif |
| destroy_inodecache(); |
| out: |
| return err; |
| } |
| |
| static void __exit exit_iso9660_fs(void) |
| { |
| unregister_filesystem(&iso9660_fs_type); |
| #ifdef CONFIG_ZISOFS |
| zisofs_cleanup(); |
| #endif |
| destroy_inodecache(); |
| } |
| |
| EXPORT_NO_SYMBOLS; |
| |
| module_init(init_iso9660_fs) |
| module_exit(exit_iso9660_fs) |
| MODULE_LICENSE("GPL"); |
| |